Karla is a recurring character in the works of John le Carré. A Soviet Intelligence officer, he is the head of the Thirteenth Directorate of Moscow Centre, le Carré's fictional version of the KGB, and the nemesis of le Carré's frequent protagonist George Smiley. Karla is nominally an unseen character who operates either through functionaries, hitmen, or by turning his enemies into double agents. Although other characters recount their past meetings with him, he only appears once during the events of the books. His real name is never revealed; instead, he takes his code name from that of the first spy network that he recruited.